The oxygen-poor environment of bogs help them preserve organic material for very long periods of time. Here, a team of paleontologists excavate an ancient bog near Rawlins, Wyoming, in search of mammoth remains.

Photograph by David Boyer

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bog
bog Encyclopedic Entry

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6-12+

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Geography, Science

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A bog is a wetland of soft, spongy ground consisting mainly of partially decayed plant matter called peat